{"title":"Study of atmospheres in the solar system, from stellar occultation or planetary transit","authors":"B. Sicardy","doi":"10.5802/crphys.109","DOIUrl":null,"url":null,"abstract":". Stellaroccultationsandtransitsoccurwhenaplanetarybodypassesinfrontofastar(includingour Sun). For objects with an atmosphere, refraction plays an essential role to explain the drops of flux and the aureoles observed during these events. This can be used to derived key parameters of the atmospheres, such as their density, pressure and temperature profiles, as well as the presence of atmospheric gravity waves and zonal winds. Here we derive from basic principles the equations that rule the ray propagation in planetary atmospheres, and we show how they can be used to derive the physical parameters of these atmospheres. Les occultations stellaires et les transits se produisent lorsqu’un corps planétaire passe devant une étoile (y comprisnotreSoleil).Pourlesobjetsavecuneatmosphère,lerôledelaréfractionestessentielpourexpliquer les chutes de flux et les auréoles observées lors de ces événements. Ces derniers peuvent être utilisés pour déduire des paramètres clés des atmosphères, comme leurs profils de densité, de pression et de température, ainsi que la présence d’ondes de gravité ou de vents zonaux. A partir des principes fondamentaux, nous déduisons les équations qui régissent la propagation des rayons dans les atmosphères planétaires, et nous montrons comment elles peuvent être utilisées pour déduire les paramètres physiques de ces atmosphères.","PeriodicalId":50650,"journal":{"name":"Comptes Rendus Physique","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Comptes Rendus Physique","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.5802/crphys.109","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 5
Abstract
. Stellaroccultationsandtransitsoccurwhenaplanetarybodypassesinfrontofastar(includingour Sun). For objects with an atmosphere, refraction plays an essential role to explain the drops of flux and the aureoles observed during these events. This can be used to derived key parameters of the atmospheres, such as their density, pressure and temperature profiles, as well as the presence of atmospheric gravity waves and zonal winds. Here we derive from basic principles the equations that rule the ray propagation in planetary atmospheres, and we show how they can be used to derive the physical parameters of these atmospheres. Les occultations stellaires et les transits se produisent lorsqu’un corps planétaire passe devant une étoile (y comprisnotreSoleil).Pourlesobjetsavecuneatmosphère,lerôledelaréfractionestessentielpourexpliquer les chutes de flux et les auréoles observées lors de ces événements. Ces derniers peuvent être utilisés pour déduire des paramètres clés des atmosphères, comme leurs profils de densité, de pression et de température, ainsi que la présence d’ondes de gravité ou de vents zonaux. A partir des principes fondamentaux, nous déduisons les équations qui régissent la propagation des rayons dans les atmosphères planétaires, et nous montrons comment elles peuvent être utilisées pour déduire les paramètres physiques de ces atmosphères.
期刊介绍:
The Comptes Rendus - Physique are an open acess and peer-reviewed electronic scientific journal publishing original research article. It is one of seven journals published by the Académie des sciences.
Its objective is to enable researchers to quickly share their work with the international scientific community.
The Comptes Rendus - Physique also publish journal articles, thematic issues and articles on the history of the Académie des sciences and its current scientific activity.
From 2020 onwards, the journal''s policy is based on a diamond open access model: no fees are charged to authors to publish or to readers to access articles. Thus, articles are accessible immediately, free of charge and permanently after publication.
The Comptes Rendus - Physique (8 issues per year) cover all fields of physics and astrophysics and propose dossiers. Thanks to this formula, readers of physics and astrophysics will find, in each issue, the presentation of a subject in particularly rapid development. The authors are chosen from among the most active researchers in the field and each file is coordinated by a guest editor, ensuring that the most recent and significant results are taken into account. In order to preserve the historical purpose of the Comptes Rendus, these issues also leave room for the usual notes and clarifications. The articles are written mainly in English.